You are troubleshooting an eMac that has no image on its built-in display. You have already checked user controls and reset PRAM, but the issue persists. When you connect an external display to the…

You are troubleshooting an eMac that has no image on its built-in display. You have already checked user controls and reset PRAM, but the issue persists. When you connect an external display to the eMac's VGA output port and restart the eMac, you see a proper image on the external display. Which of the following service modules would most likely be the cause of these symptoms?